Rotary sprinkler.



E. GEIGER.

ROTARY SPRINKLER.

. APPLICATION FILED DEC. 23, 1912. 1,078,727. Patented Nov. 18, 1913.

In van tor ttorney.

Witnesses- -l/ E UGEN GHG I KARLSRUHE,

BOTABY SPRLNKLEB- Specification of Letters Patent.

Patented Nov. 18', 19.13.

Application led December. 23, 1912. Serial Np. 738,2.

To all whom it may concern:

Be it. known that I, EUGEN Garon ject of the German Emperor, resi ing at Karlsruhe, Baden, Germany, have invented a certain new and useful Rotary Sprinkler,

of which the following is a specification.

This invention relates to a vso-called rotary sprinkler, that is, an apparatus especially applicable for the irrigation of fields with fecal or other water, operating in the same mannerl as the Segner re-act-ion wheel, consisting chiefly of a stand pipe and a rotary body having radial pipes mounted thereon, from which pipes the water entering the rotary body from the stand pipe under pressure 1s expelled through a series of lateral holes provided along the whole length thereof, whereby the rotary body with. the radial pipes is rotated around the axial stand pipe in consequence of the re-acti'on, so that the whole ground surface, which surrounds the latter and which is limited by a circle described by tlie outer extremities of the radial pipes is uniformly irrigated. ln this rotary sprinkler, the seal of the annular groove between the stand pipe and the base of the rotary body is effected hy two mercury and glycerin seals between which is provided the lower ball bearing of the rotary body. In

the known rotary sprinklers of this type, it occurs, that in consequence of strong water impacts in the interior of the rotary body, to which the inner mercury and glycerin seals are also exposed, and which are transmitted by this to the outer seal, of which the contents is wholly or partially thrown out, and that on the recoil of the contents of the inner seal subsequent to such an impact a portion of the glycerin escapes toward the interior of the rotary body.

The invention is for the purpose of automatically' equalizing such losses in the liquid for the seals.

In the accompanying drawing Figure 1 shows a vertical section of a rotary sprinkler provided according to this invention, while Figs. 2 to 4 show the most important part in three different sections.

The stand pipe a is closed at the top by a hood b which is provided with four openings c and carries a column d. On this column is mounted a pan e in which a ball bearing f iS provided. On' this bearing rests a cover g which closes the upper end of the pi e h provided on the liood-like rotary body i.

a sub- The latter is provided with our radial pipe supports k, each having a ange, to which the radial sprinkler tubes Z, also provided with flanges are bolted. The detachable base m of the rotary bodyz' a0, 1s provided with two downwardly projecting concentric ring members n and o. The inner ring memberl n projects freely into the annular space pl between the stand pipe a and the cylin er 7', surrounding the atter and d@ mounted upon a flange g, which ,ace is partly filled with mercury and part with glycerin. The outer short member o projects freely into a groove s of the u per part of the cyl- 1Q, inder r which also is filed partly with mercury and partly with glycerin. Between the member n and the` upper part of the cylinder 1' there are provided in an annular groove of .the latter a series of balls t form- 1li ing a bearing. On the base m of the rotary body z' is mounted a tubular member u having a branch o. This tubular member is by means of a boring w in the base m in communlcation with an air chamber provided 12. below the latter and between the members n and'o, while the branch o is bv means of an inclined narrow passage a: in the base m in communication with the annular space p1 between the member n and the stand pipe a. 8.5 A second passage y in the base m leads from the boring w to the exterior of the member o. From the tubular member u also leads upward through the walls of the rotary body z' a pipe z of which the outer extremity is 90 provided with a closing cap al having a number of small holes.

lVhen there is a strong water im act in the interior of the rotary body z', t eair, which is expelled by the gylcerin passing upwardly outward from the chamber can escape into the atmosphere throug the tubular member u, the pipe e and the holes in the cap, 21, and the glycerin rises in the tubular member u. In this manner a portion of the glycerin passes into the branch o, from where it passes into the annular space p through the passage after the usual pressure COJldition in thel interior of the rotary body i which is in communication 1.05 with this space is again produced. In this manner the glycerin, which on the recoil subsequent to the water impact passed out of the space o1` into the interior of the rotary body i, is automatically replaced. In a simi- 1.10

lar manner a portion of the glycerin from the tubular member u passes through the passage y into the outer part of the groove s whereby the glycerin which may have been expelled from this nrroove on the water 1mpact is replaced. The annular space p from which the necessary glycerin is removed for supplemenfingthe contents of the chamber p1 and the outer part of the groove s, must therefore be replenished eriodically through the tube a and the tu ular member u.

Having thus described my invention,wliat I claim as new and useful, and desire to secure by Letters Patent, is

1. In a rotary sprinkler the combination of a stand pipe, a rotary body mounted thereon, radial sprinkler tubes fixed to said rotary body, two downwardly projecting concentric ring members provided on the base 0f said rotary body, a cylinder surrounding said stand pipe, and spaced therefrom to form an annular chamber, an annular groove provided in the top of said cylinder, said annular chamber and groove being filled partly with mercury and partly with glycerin, said ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cylinder and the inner of said ring members and substantially above the mercury contained in said annular chamber, a tubular member mounted on the base of said rotary body and provided with a branch, and an air chamber provided below the base of said rotary body and between said ring members, said tubular member and branch being in communication with said air chamber and with the inner part of said annular chamber respectively.

2. In a rotary sprinkler the combination of a stand pipe, a rotary body mounted thereon, radial sprinkler tubes fixed to said rotary body, two downwardly projecting concentric ring members provided on the base of said rotary body, a cylinder surrounding said stand pipe, and spaced therefrom to form an annular chamber, an annular groove provided in the top of said cylinder, said annular chamber and groove being filled partly with mercury and partly with glycerin, said ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cylinder and the inner of said ring members yand substantially above the mercury contained in said annular chamber, a tubular member mounted on the base of said rotary body and provided with a branch, and an air chamber provided below the base of said rotary body and between said ring members, said tubular member being in communication with said air chamber and with the exterior of 'the outer of lsaid ring members projecting into said annular groove, and said branch being in communication with the inner part of said annular chamber.

3. In a rotary sprinkler thc combination of a stand pipe, a rotary body mounted thereon, radial sprinkler tubes fixed to said rotary body, two downwardly projecting concentric ring members provided on the base of said rotary body, a cylinder' surrounding said stand pipe, and spaced therefrom to form an annular chamber, an annular groove provided in the top of said cylinder. said annular chamber and groove being filled partly with mercury and partly with glycerin, said ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cylinder and the inner of said ring members and substantially above the mercury contained in said annular chamber` a tubular member mounted on the base of said rotary body and provided with a branch, an air chamber provided below the base of said rotary body and between said ring members, said tubular member and branch being in communication with said air chamber and with the inner part of said annular chamber respectively, and a pipe leading from said tubular member upward through the walls of said rotary body.

4. In a rotary sprinkler the combination of a stand pipe, a rotary body mounted thereon, radial sprinkler tubes fixed to said rotary body, two downwardly projecting concentric ring members provided on the base of said rotary body, a cylinder surrounding said stand pipe and spaced therefrom to form an annular chamber, an annular groove provided in the top of said cylinder, said annular chamber and groove being filled partly with mercury and partly with glycerin, said ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cylinder and the inner of said ring members and substantially above the mercury contained in said annular chamber, a tubular member mounted on the base of said rotary body, and provided with a. branch, an air chamber provided below the base of said rotary body and between said ring members, said tubular member being in communication with said air chamber and with the exterior of the outer of said ring members projecting into said annular groove, and said branch bein in communication with the inner part o said annular chamber, and a pipe leading from said tubular member upward through the walls of said rotary body. Y

5. In a rotary sprinkler the combination of a stand pipe, a rotary body mounted thereon, radial sprinkler tubes fixed to said rotary body, two downwardly projecting ring members provided on the base of sai rotary body, a cylinder surrounding said stand pipe, and s aced therefrom to form an annular cham r, an annular oove provided in the top of said cy inder, said annular chamber and groove being filled partly with mercur and partly with glycerin, said ring mem ers projecting freely into said annular chamber and groove respectively, a ball bearing rovided between said cylinder and the inner of said ring members and substantially above the mercur contained in said annular chamber, a tubu ar member mounted on the base of said rotary body and provided with a branch, an air chamber provided below the base of said rotary body and between said ring members, a boring provided in the base of said rotary bod and connecting said tubular member wit said air chamber, and a passage also provided in said base and connecting said branch with the inner part of said annular chamber.

6. In a rotary sprinkler the combination of a stand pi e, a rotary body mounted thereon, radia sprinkler tubes fixed to said rotary body, two downwardly projecting concentric rlng members provided on the base of said rotar body, a cylinder surrounding said stan pipe, and spaced therefrom to form an annular chamber, an annular groove provided in the top of said cylinder, said annular chamber and groove being filled partly with mercury and partly with glycerin, said ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cyllnder and the inner of said ring members and substantially above the mercury contained in said annular chamber, a tubular member mounted on the base of said rotary body and provided with a branch an air chamber provided below the base o said rotary body and between said rin members, a boring provided in the base o said rotary body and connecting said tubular member with said air chamber, a passage also provided in said base and connecting said branch with the inner art of said annular chamber, and a secon passage in said base leading from said boring to the exterior of the outer of said ring members.

7. In a rotary sprinkler the combination of a stand pi e, a rotary body mounted thereon, radia sprinkler tubes fixed to said rotary body, two downwardly projecting concentric ring members provided on the base of said rotar body, a cylinder surrounding said stan pipe, and spaced therefrom to form an annular chamber, an annular groove provided in the top of 'said cylinder, said annular chamber and groove being filled partly with mercury and partly with glycerin, sald ring members projecting freely into said annular chamber and groove respectively, a ball bearing provided between said cylinder and the inner of said ring members and substantially above the mercury contained in said annular chamber, a tubular member mounted on the base of said rotary body and provided with a branch, an air chamber provided below the base of said rotary body and between said ring members, a boring provided in the base of said rotary body and connecting said tubular member with said air chamber, a passage also provided in said base and connecting said branch with the inner part of said annular chamber, a second passage in said base leading from said boring to the exterior of the outer of said ring members, and a pipe leading from said tubular member upward through the walls of said rotary ln. testimony whereof I have hereunto signed my name in the presence of two sub- 

